Question

3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O

In the above equation how many grams of water can be made when 8 grams of HNO3 are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Answer 1

Answer: 1.1433g

Step-by-step explanation:

Answer 2

The equation tells us that for every 8 moles of HNO3 that react, 4 moles of H2O are produced. So we need to first convert the 8 grams of HNO3 to moles and then find the number of moles of H2O produced.

Using the molar mass of HNO3 (63.0 g/mol), we find:

8 g HNO3 / 63.0 g/mol = 0.127 mol HNO3

Since 4 moles of H2O are produced for every 8 moles of HNO3, the number of moles of H2O produced would be:

0.127 mol HNO3 * (4 moles H2O / 8 moles HNO3) = 0.064 mol H2O

Finally, to find the mass of H2O produced, we use the molar mass of H2O (18.0 g/mol):

0.064 mol H2O * 18.0 g/mol = 1.16 g H2O

So, when 8 grams of HNO3 are consumed, approximately 1.16 grams of H2O can be made. Round to the nearest tenth, the answer is 1.2